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Diatomaceous earth is actually a layer of the remains of ancient diatom plants and other single-celled organisms. Generally, diatomaceous earth is biased to white, such as white, gray, gray, etc., because its density is generally only 1.9 to 2.3 per cubic meter, so its internal structure has a large gap, and its porosity is as high as 100. The diatomaceous earth is particularly easy to be ground into a powder. Therefore, the commercially available diatomaceous earth is powdery.
Since the main forming object of diatomaceous earth is diatom, it mainly exists in places such as Shandong, Jiangxi, Yunnan, Sichuan, etc. where China has been or has sufficient water. Moreover, with the diversity of processing methods of diatomaceous earth, the product varieties of diatomaceous earth are also particularly numerous. Today, the market is mainly divided into three types: montmorillonite, white clay and attapulgite. Among them, active clay is the most widely used, but if it is used in the processing of edible oil, its requirements will be higher, and its quality will be divided into several grades according to different purposes.
In today's international market, the United States is the largest producer of diatomaceous earth, with an average annual production of more than 700,000 tons. Secondly, it is Denmark in Europe, and its products are mainly clayy diatomaceous earth. However, the amount of diatomite in China is not very small, but it lacks high-quality diatomite. Today, high-quality diatomite is mainly concentrated in the Changbai Mountain generation. However, due to the development of market economy and the implementation of relevant policies, China’s The diatomite industry is still developing well, mainly for the filtration of industrial product colors.
For the decolorization of diatomaceous earth, pickling and roasting are generally used, and in the current industry, in order to further improve the product effect, activated carbon is added to ensure that the colored substances in the solution and other products have a negative quality. The affected substances are completely absorbed. The ratio of the amount of diatomaceous earth and activated carbon can be from 0.2% to 0.3% of the article. And in general, stirring it for ten minutes to fifteen minutes can completely remove substances that have a negative impact on the product. Many people use the simplest resin method when decolorizing non-white diatomaceous earth, but in fact this method is not used, it is easy to have problems, and it does not achieve the expected results, so it is recommended that you do not be afraid. Trouble, it is still carried out by pickling and roasting, and there are also professional equipment purchases on the market, and the price is fair.
The above is about the decolorization of diatomaceous earth, I hope that you can help.
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